Generate an SVG (width="1200" height="900" viewBox="0 0 1200 900") as a birthday greeting card illustration. Warm hand-drawn watercolor style. Draw a 2-tiered birthday cake at lower-center in amber (#D97706) and cream (#FFFBEB), topped with a sunflower shape (petal ring in #F59E0B, dark center). Add 2 sunflower shapes of different sizes flanking the cake. Scatter sunflower petal shapes and small star dots in golden yellow across the upper area. Warm golden glow ellipse behind (opacity 0.3). Soft watercolor feel. No text, no labels, no emoji. Output raw SVG code only starting with <svg.

The image shows a wedding cake with sunflowers on top of it, set against a white background. The cake is animated, with the sunflower petals radiating outwards from the center of the cake.